Machine for stripping blanks for paper boxes.



No. 810,971. PATENTED JAN. 30, 1906.

L. 0. PALMER.

MACHINE PORSTRIPPING BLANKS FOR PAPER BOXES.

kAPPLIUATION FILED Nov. 17,1904.

2 SHEETS-SHEET 1.

No. 810,971. PATENTED JAN. 30, 1906.

L. C. PALMER. MACHINE POR STRIPPING BLANKS POR PAPER BOXES.

APPLIOATION FILED Nov.17,19o4.

z SHEETS-'SHEET z.

l1' .4, 1"' .j if? 0 l 0 i. .1 /01 yi f y .Y f l i Tin-TTnn sTaTns TATTENT 'armen LYN DON C. PALMER, OF BUFFALO, 44NEW YORK.

Specification of Letters Patent.

WIACHHNE FOR STHIPPNG LANKS FOR PAPER BOXES.. y

Patented aan. 3o, 1906.

Application filed NOVBmbel 17, 1904. Serial No. 233,148.

ATo 'a/ZZ whom it may concern:

Be .it known that I, LYNDON C. PALMER, a

` citizen of the United States, residing at Buffalo, in the county of Erie and State of New I l York, have invented certain new and useful Improvements in Machines for Stripping Blanks for Paper Boxes, of which the follow# ing is aspecification.

My invention relates to machines for strip- `ping blanks for paper boxes, whereby the lap or marginal portion of the blank is reduced in thickness.

In forming square boxes the cardboard blanks yare scored lengthwise at points forming the vertical 'edges of the box, and the lap or marginal portion overlaps one of the sides and is glued thereto. the blank as now done is objectionable not only because it is unsightlywhen the regular thickness of cardboard is overlapped, but

`also for the reason that two thick layers are not as quickly and as securely glued to! ether as one thin layer glued to a thick layer. y stripping the lap of the blank to reduce the thickness the lap can-be quickly and con-` veniently glued without resortingl to pressure to hold the two layers together, whereas ingluin two thick layers together the folded blan must be held in a press for some time, thus consuming valuable time and reuiring considerable. labor, with the result 'A t at an unsightly and less rigid box is` conl blank .is fed to the stripping-knife with thev structed than by themethodpfstripping the cardboard.

` The object of my invention is to produce a machine which will strip the lap or marginal `portion of a cardboard blank as it is fed through the same for the purpose of reducing the thickness of said marginal portion.

Other objects are to construct a machine of this type which can be adjusted to feed the lap accurately to the stripping knife irrespective of the width of the lap or the width of the blank, to `provide a simple, effective, and durable machine of fewl parts, and to provide flexing and feeding rolls whereby the aper separated at thelap from the, scoreine outward.

With these and other objects in view the vinvention consists in a series of feed-rolls, means for flexing the blank at the lap or marginal portion to separate the layers of paper This overlapping of from the score-line outward, and means for stripping the paper'to reduce the thickness of the same at the lap.

It also consists in the construction, combination, and arrangement of parts to be hereinafter described, and particularly pointed out in the appended claims. L

In the drawings, Figure 1 is a side elevation of my stripping-machine. Fig2 is a top plan view of the same. Fig. 3 is a longi-l tudinal section taken on line 3 3, Fig. 2. Fig. 4 is an enlarged transverse section taken on line 4 4, Fig. 2. Fig. 5 is an enlarged transverse section taken on line 5 5, Fig. 2. Fig. 6 is an enlarged transverse section t'aken on line 6 6, Fig. 2. Fig. 7 is a sectional perspective view of a Vportion of a cardboard blank, showing the score-line dividing the lap from the remainder of the blank. Fig. 8

4is a similar view showing the lap flexed 'after several figures.

letters of reference refer to like parts in the Fig. 10 is a sectional pera box, showing j l The reference-letter A designates the frame of the machine, having the tableB semay be stacked for quickly feeding them into the machine. inverted-T-shaped -groove C, in which a nutl D is confined for the reception of a clampingbolt E, which passes through a longitudinally-disposed gage F and serves to fasten the latter in any adjusted position. A G designates a pair of feed and flexing rolls secured `to shafts g, journaled in suitable bearings g in the frame. ings are rigid within the frame, while the upper bearings are yieldingly held in vertical openings H. .Aspring h serves to hold the upper roller yieldingly against the lower roller. designates a second pair of feed and flexing vcured thereto, on which the scored eardboards This table has a transverse too" The lower bearl rolls are eared toget er by gears K, vand the ears of t e lower rolls are m mesh with a gear on` the power-shaft M, which'latter is also rovided with the usual loose and tight puleys m m', respectively. The delivery-rolls be fed forward between the rolls.

tioned pair of feedand flexing rolls.

'of a horlzontal securing portion s, bolted to-v are geared to ether by 'gears N, the lower one of which is he d in mesh with an idler ln, driven by the gear K on the lower` roll ofthe lsecondi' mentioned pair of feed and exing rolls. Thus the ro ls are all operative connected with the power-shaft to cause t e blanks to The upper rollsof the feed and flexing rolls are of equal length, and each is provided with an annular groove O near one end to form a gage edge o, the cardboards being fed to the rolls with the score-line in registration with said a e edge. Each upper feed-roll is also prov-i e with a ilexin -rim P, which is of reater diameter than t e body of the roll. he lower roll of the first-mentioned pair of feed and flexing rolls extends slightly beyond the` age edge of the upper rolls, whi e the lower ro l 'of the second-mentioned pair of feed and exing rolls is somewhat longer than the lower roll of the first-mentioned pair and extends beyond the gage edge of the upper rolls to' a greaterextent than does the ower roll of the iirst-'men- R designates a platform located between the feed-rolls and delivery-rolls, over which the cardboard blanks pass as they leave the feed-rolls.

y VS designates the stripping-laufe, consisting the frame of the machine at s', a depending portion s2, and an inclined cutting-blade's3, extendinginto a de res'sion T in the platform R, said cutting-bla e lying in the path of the flexed la of and substantially parallel with the card oard blank as it leaves the feed and flexing rolls. x

In operating the machine the several rolls are revolved in a direction to feed the cardboard blanks between the rolls to thestripping-lmife. and delivery-rolls, the latter gripping the blanks and deliverin the same'to a suitable platform or receptac e, from which they ma be carried to a glun -machine for gluing t e lap portion, o r, 'v desired, the

= strip ed blanks may be, delivered directly to the g u' machina A A From/t e foregoing it is apparent that the longitudinal gage F on the ta e B maybeadjusted to any point in the width of the table, which ernnts blanks of'any Widthto be fed throug the machine with the score-line form- 'ing the lap held in registration with the gage air of feed and flexing edges o of the' feed and iiexing rolls. The blanks are fed Avinto the machine with the scored side face up, and as they pass -between the first pairof feed and flexing rolls the flexing-riml of the upper roll forces down that portion of the la extending beyond the edge of the lower ro l, which causes the paper layers forming the board to separate from the score-line out toward the edge a certain distance, the thickness of the paper being thus separated depending on the de th of the score made inthe blank. If desire the iiexed lap with a portion thereof thus separated from the blank may be presented to the strip ingknife without passin through a secon pair of iiexing-rolls; but have obtained best rc- Sults by passing them between a second pair of flexing-rolls, which serve to further separate the layers of the board, rendering it comparatively easy to strip the board as it comes 1n contact with the strlpping-knifc. By separating the paper as'above described throug out the length of the lap assurance is had that the strip will be evenly cut throughout its length. When the stripped cardboard is glued, it is foldedat the score-lines to form a tube, with the stripped lap glued against oneA of the sides. Ordinarily the cardboard is of sufHcient length to form a number of boxes and after being glued and folded is cut to the desired lengths to form the sides of the box.

This invention is susceptible -to many changes inthe form, arrangement, and construction of-parts without departing from the sco e thereof, and I do not Wish to linut mysel to the embodiment of my invention herein disclosed.

Having thus described my invention, what I claim is- 1. In a machine for stripping cardboard blanks or the like, the combination with a suitable frame, of a feeding device for feeding the blanks forward, and a stripping device in the path of the blank for reducing the thick.- ness of the mar inal portion of the latter so that the reduced marginal portion is of even thickness throughout.

.marginal portion thereof as it passes through the machine so that* the reduced marginal portion is of even thickness throughout.

' 3. In a machine for stripping cardboard blanks or the like, the combination with a suitable frame, of feed-rolls revolubly mounted in the frame, and a stripping-knife located in thepath of the .blank as it leaves the feedrolls, said knife having its cutting edge arranged substantially parallel with the face of IOO IIO

the ma al portion of the blank to reduce the thic ess thereof. t 4

4. In a machine for stripping a cardboard blank or the like, the combination with a suitable frame, of feed-rolls and delivery-rolls revolubly mounted in the frame, and a stripping device lying in the path of the blank between the feed-rolls and the delivery-rolls,l

and ada ted to reduce the thickness of the margina portion of the blank.

5. In a machinefor strippin(i the marginal ortion of a scored cardboard blank, the oombination with a frame, of a stripping-knife carried on the frame, and means for flexing the marginal portion of the blank and feeding the blank to said stripping-knife.

6. In a machine for stripping the marginal portion of a cardboard blank scored'near one edge, the combination with a frame, of feed and' flexing rolls revolubly mounted in the frame to flex said marginal portion and separate the layers of the same from the scoreline toward the edge of the blank, and means for stripping the marginal portion Yof the blank as it leaves the feed and exing rolls.

7. In a machine for stripping the marginal portion of a cardboard blank scored near one edge, the combination with a frame, of a pair of rolls between which said blank is passed,

- one of said rolls being longer than the other and having a flexing-rim at its outer end adapted to flex that portion of the blank extending beyond the end of the other roll to separate the layers of the blank from the score-line toward the edge of the Same, and a stripping-knife in the path of the blank as it leaves said rolls.

8. In a machine for stripping the marginal portion of a cardboard blank scored near one edge, the combination with a frame, of a pair of rolls arranged one above the other between which said blank is passed, the up er of said rolls being longer than the lower ro l and having a circumferential groove and a flexingrim at its outer end, said rim serving to flex that portion of the blank extending beyond the end of the lower roll to separate the layers of the blank from the score-line toward the that portion ofthe blank extending beyond Y the end of the lower roll to separate the layers of the blank from the score-line toward the ed e of the same, a platform in rear of said rol s provided with a depression in line with the flexing ends of said rolls, and a strippingknife havin@ its cutting-blade extending into said depression.

10. In a machine for stripping the marginal portion of a cardboard blank scored near one edge, the combination with a frame, of a pair of feed and flexing rolls revolubly mounted in said frame, `the upper roll thereof having an .end flexing rim and a circumferential groove formin a gage edge and the lower roll thereof exten ing slightly beyond said gage edge, a second pair of revolubly mounted similar rolls having the gage edge of the upper roll in line with the gage edge of the u per roll of the first-mentioned pair of ro ls and the adjacent end of the lower roll extending beyond the corresponding end of the lower roll of the first-mentioned pair of rolls, and a stripping-knife in rear of said rolls in line with the flexing ends of the latter.

In testimony whereof I have affixed my signature in the presence of two subscribing witnesses.

LYNDON C. PALMER.

Witnesses:

EMIL NEUHART, CHAs. F. BURKHART. 

